extern int buf[];

int *bufp0=&buf[0];
static int *bufp1;

static void incr()
{
	static int count=0;

	count++;
}

void swap()
{
	int temp;

	incr();
	bufp1=&buf[1];
	temp=*bufp0;
	*bufp0=*bufp1;
	*bufp1=temp;
}

